Improvement in sandpapering-machines



UNITED- STATES PATENT OFFICE WILLIAM CARLISLE, OF CHICAGO, ILLINOIS.

IMPROVEMENT IN SANDPAPERING-MACHINES.

Specication forming part of Letters Patent No. 213,807, dated April 1,1879; application filed October 23, 1878.

To all whom 'it may concern:

Be it known that I, WILLIAM CARLISLE, of the city of Chicago, in theState of Illinois, have invented certain new and useful Improvements inSandpapering-Machines; and I hereby declare that the following is afull, clear, and exact description thereof, reference being had to theaccompanying drawings, and to the letters of reference marked thereon,which form a part of this specification.

My invention relates to that class of sandpapering-machines adapted tooperate on both sides of a panel at the same time; and it consists in anarrangement and construction of the parts hereinafter described, toallow of the position of one of the polishing-wheels being readilychanged, to suit circumstances, without aii'ecting the guides, and incertain details t of construction, which will be hereinafter more fullyset forth.

In the drawings, Figure 1 is a top or plan view of the machine. Fig. 2is a central transverse vertical section thereof 5 and Figs. 3 and 4 areviews of details, enlarged.

A is a table, supported at convenient height for use by a personstanding. B B and B' B' are parallel standards rising from the table A,and supporting in appropriate bearings the two arbors R and R', arrangedin the same axial line. At the inner or proximate ends of these arborsare iixed two face-wheels, F and F', having the face of one parallelwith that of the other. Each wheel is provided with a circumferentialrim or hoop, fr, circular or polygonal as the case may be, by whichsand-paper is firmly and smoothly held to cover the face of the wheel.One wheel is adjustable toward the other by the longitudinal adjustmentof its arbor in its bearings.

In the drawings, R is shown to be thus adjustable by means of the sleeveH, tted between a shoulder upon the arbor and an outer collar, c, pinnedto the arbor. The sleeve H is also shown as adaptedto slide backward andforward closely in the outer standard, B, and as constituting, in fact,the outer bearing of the arbor. It has a vertical groove on each side,as more clearly shown in Fig. 4, entered by the two arms gf the carrierL. The carrier is worked by the set-screw E, fixed to the outerstandard, B, as seen in Fig. 2, so that by its rotation the sleeve H andthe arbor R may be longitudinally adjusted at pleasure.

The two arbors B. and Rbare driven in opposite directions by the commondriving-shaft S, located beneath the table, through the belts T and T',one of which is twisted, as shown.

As general guides for the stu being finished as it is passed between thesandpaperingwheels F and F', vertical pieces G Gr are secured to thetable, as clearly shown in Figs. l and 2. These pieces rise above therotating facewheels, for the purposes of greater strength, and to moreperfectly inclose the working-surfaces, which are further hooded, inuse, to confine the dust. One piece, G, is adjustable on the table bymeans of the slotted foot-brackets M M, so that its inner face may beheld nearly gush with the face of the corresponding wheel,

G' is permanently set in the same relation with the un'adj ustableface-wheel F'. As more specific guides for the panels being finished,the rabbeted strip N is fixed between the guide-pieces G and G', and alaterally-adj ustable strip, a, is secured thereto by screws n n', so asto form with N the variable groove g, in which slides the reduced edgeof a raised panel.

A corresponding edge-guide is provided for the upper reduced edge of thepanel in the grooved strip I. This strip is both removable and laterallyadjustable by means ofthe screws p p, by which it is held to theangle-piece K. For this upper edge-guide it is more convenient to changethe strip I than to regulate an adjustable groove in the strip, as inthe case of the lower one, N, for the few thicknesses of panels made ineven extensive works. A guide having an adjustable groove may, however,be used in this position. The strip I is vertically adjusted by means ofthe head O, to which the angle-piece K is firmly attached. This head isiitted to slide freely on the vertical post J, and is set at any desiredpoint by means of the clamp-screw m.

B y this arrangement of the adjusting devices the polishing-wheel F canbe adj usted-without changing the position of the guides, which will befound very advantageous; or, by turning the screw E backward, the wheelF may be moved away from the other wheel, so as not to operate on apanel passing through the guides, where only one side of it requiresfinishing.

The face-wheels F and F are set so far above the table A, and are ofsuch size, that they will embrace the entire width of the raised face ofpanels for which the machine is intended, so that both surfaces areentirely finished byasingle passage of the panel through the machine.

The carrier L, instead of being a separate piece, forked or otherwise,engaging,r the sleeve H to carry it inward or outward bythe action ofthe screw E, may be cast solid with the sleeve; so, instead of makingthe sleeve the bearing, the latter may be permanent in the standard B,and the forked carrier L may be made to propel the arbor longitudinallyby Working in a circumferential groove in the arbor.

In order that the face-wheels F and F', rotating in opposite directions,as described, may not act to advance or retard the passage of the panelbetween them, but may, in this respect, counteract each other, theyshould be of equal diameter and rotated at the same speed, unless themiddle line of the panel passes over the center of the wheel-surface, inwhich case variations in these particulars would make no difference withthe feed; but the Wheels being made large enough for the widest panels,in ordinary cases the panel is mainly below the center of thewheel-surfaces. A variation in the speed of the wheels can in this caseobviously be made to give any rapidity of self-feed. Provision for suchvariation is not herein shown, since little power is required to feedthe stuli through the nisher,

and with the equal speed obtained by the common shaft S, having drums Dand D of equal diameter, and the equal pulleys P P', panels and otherstuff of width no greater than the height of the upper margin of thewheels may he finished with no eiiect upon the feed from thefinishing-wheels.

Havin g thus described my invention, I claim and desire to secure byLetters Patent- 1. In a sandpapering-machine, the combina tion of twofinishing-wheels, one running in lxed bearings and the other adjustablelaterally, with a set of upper and lower guides adjustable independentlyof the wheels, substantially as described.

2. In a sandpaperingmachine, the combination of a inishingwheelrevolving in fixed bearings and a finishing-wheel adjustable laterally,with the sliding bearing .El and screw E, substantially as described.

3. 1n a sandpapering-machine, the combination of the strips N n with thegrooved strip I, arranged to guide the panel between the twoiinishing-wheels, or hold it in contact with one of them, substantiallyas described.

4. In a sandpapering-machine, the combination, with the guide N n, ofthe standard J, sliding head 0, angle-piece K, and guide I, allconstructed and arranged substantially as described.

In testimony that I claim the foregoing as my invention I affix mysignature in presence of two witnesses.

IVI LLIAM CARLISLE.

Witnesses M. E. DAYTON, JESSE Cox, Jr.

